Humans are the only primate species in which mammary glands (breasts) remain large and prominent throughout adulthood. Other primates’ mammary glands swell only when they are nursing offspring; scientists are not sure why human females have noticeable breasts on a permanent basis. One hypothesis is that they increase a female’s ability to attract mates. If so, this would be an example of a trait favored by…
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Humans are the only primate species in which mammary glands (breasts) remain large and prominent throughout adulthood. was first posted on August 15, 2020 at 5:00 am.
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